/*
 * wc.h :  shared stuff internal to the svn_wc library.
 *
 * ====================================================================
 * Copyright (c) 2000-2006 CollabNet.  All rights reserved.
 *
 * This software is licensed as described in the file COPYING, which
 * you should have received as part of this distribution.  The terms
 * are also available at http://subversion.tigris.org/license-1.html.
 * If newer versions of this license are posted there, you may use a
 * newer version instead, at your option.
 *
 * This software consists of voluntary contributions made by many
 * individuals.  For exact contribution history, see the revision
 * history and logs, available at http://subversion.tigris.org/.
 * ====================================================================
 */


#ifndef SVN_LIBSVN_WC_H
#define SVN_LIBSVN_WC_H

#include <apr_pools.h>
#include <apr_hash.h>

#include "svn_types.h"
#include "svn_error.h"
#include "svn_wc.h"

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */


#define SVN_WC__TMP_EXT       ".tmp"
#define SVN_WC__TEXT_REJ_EXT  ".rej"
#define SVN_WC__PROP_REJ_EXT  ".prej"
#define SVN_WC__BASE_EXT      ".svn-base" /* for text and prop bases */
#define SVN_WC__WORK_EXT      ".svn-work" /* for working propfiles */
#define SVN_WC__REVERT_EXT    ".svn-revert" /* for reverting a replaced
                                               file */




/* We can handle this format or anything lower, and we (should) error
 * on anything higher.
 *
 * There is no format version 0; we started with 1.
 *
 * The change from 1 to 2 was the introduction of SVN_WC__WORK_EXT.
 * For example, ".svn/props/foo" became ".svn/props/foo.svn-work".
 *
 * The change from 2 to 3 was the introduction of the entry attribute
 * SVN_WC__ENTRY_ATTR_ABSENT.
 *
 * The change from 3 to 4 was the renaming of the magic "svn:this_dir"
 * entry name to "".
 *
 * The change from 4 to 5 was the addition of support for replacing files
 * with history.
 *
 * The change from 5 to 6 was the introduction of caching of property
 * modification state and certain properties in the entries file.
 *
 * The change from 6 to 7 was changing the entries file format from XML.
 *
 * The change from 7 to 8 was putting wcprops in one file per directory.
 *
 * Please document any further format changes here.
 */
#define SVN_WC__VERSION       8

/* A version <= this doesn't have property caching in the entries file. */
#define SVN_WC__NO_PROPCACHING_VERSION 5

/* A version <= this has the entries file in XML format. */
#define SVN_WC__XML_ENTRIES_VERSION 6

/* A version <= this has wcprops stored in one file per entry. */
#define SVN_WC__WCPROPS_MANY_FILES_VERSION 7

/*** Update traversals. ***/

struct svn_wc_traversal_info_t
{
  /* The pool in which this structure and everything inside it is
     allocated. */
  apr_pool_t *pool;

  /* The before and after values of the SVN_PROP_EXTERNALS property,
   * for each directory on which that property changed.  These have
   * the same layout as those returned by svn_wc_edited_externals(). 
   *
   * The hashes, their keys, and their values are allocated in the
   * above pool.
   */
  apr_hash_t *externals_old;
  apr_hash_t *externals_new;
};



/*** Timestamps. ***/

/* A special timestamp value which means "use the timestamp from the
   working copy".  This is sometimes used in a log entry like:
   
   <modify-entry name="foo.c" revision="5" timestamp="working"/>
 */
#define SVN_WC__TIMESTAMP_WC   "working"



/*** Names and file/dir operations in the administrative area. ***/

/** The files within the administrative subdir. **/
#define SVN_WC__ADM_FORMAT              "format"
#define SVN_WC__ADM_ENTRIES             "entries"
#define SVN_WC__ADM_LOCK                "lock"
#define SVN_WC__ADM_TMP                 "tmp"
#define SVN_WC__ADM_TEXT_BASE           "text-base"
#define SVN_WC__ADM_PROPS               "props"
#define SVN_WC__ADM_PROP_BASE           "prop-base"
#define SVN_WC__ADM_DIR_PROPS           "dir-props"
#define SVN_WC__ADM_DIR_PROP_BASE       "dir-prop-base"
#define SVN_WC__ADM_DIR_PROP_REVERT     "dir-prop-revert"
#define SVN_WC__ADM_WCPROPS             "wcprops"
#define SVN_WC__ADM_DIR_WCPROPS         "dir-wcprops"
#define SVN_WC__ADM_ALL_WCPROPS         "all-wcprops"
#define SVN_WC__ADM_LOG                 "log"
#define SVN_WC__ADM_KILLME              "KILLME"
#define SVN_WC__ADM_README              "README.txt"
#define SVN_WC__ADM_EMPTY_FILE          "empty-file"

/* The basename of the ".prej" file, if a directory ever has property
   conflicts.  This .prej file will appear *within* the conflicted
   directory.  */
#define SVN_WC__THIS_DIR_PREJ           "dir_conflicts"



/* A space separated list of properties that we cache presence/absence of.
 *
 * Note that each entry contains information about which properties are cached
 * in that particular entry.  This constant is only used when writing entries.
 */
#define SVN_WC__CACHABLE_PROPS                                         \
SVN_PROP_SPECIAL " " SVN_PROP_EXTERNALS " " SVN_PROP_NEEDS_LOCK


/* A few declarations for stuff in util.c.
 * If this section gets big, move it all out into a new util.h file. */

/* Ensure that DIR exists. */
svn_error_t *svn_wc__ensure_directory(const char *path, apr_pool_t *pool);

/* Baton for svn_wc__compat_call_notify_func below. */
typedef struct svn_wc__compat_notify_baton_t {
  /* Wrapped func/baton. */
  svn_wc_notify_func_t func;
  void *baton;
} svn_wc__compat_notify_baton_t;

/* Implements svn_wc_notify_func2_t.  Call BATON->func (BATON is of type
   svn_wc__compat_notify_baton_t), passing BATON->baton and the appropriate
   arguments from NOTIFY. */
void svn_wc__compat_call_notify_func(void *baton,
                                     const svn_wc_notify_t *notify,
                                     apr_pool_t *pool);

/* Set *MODIFIED_P to non-zero if FILENAME's text is modified with
 * regard to the base revision, else set *MODIFIED_P to zero.
 * FILENAME is a path to the file, not just a basename. ADM_ACCESS
 * must be an access baton for @a FILENAME.
 *
 * If FORCE_COMPARISON is true, this function will not allow early
 * return mechanisms that avoid actual content comparison.  Instead,
 * if there is a text base, a full byte-by-byte comparison will be
 * done, and the entry checksum verified as well.  (This means that if
 * the text base is much longer than the working file, every byte of
 * the text base will still be examined.)
 *
 * If COMPARE_TEXTBASES is true, the comparison will be between a
 * detranslated version of *FILENAME and the text base, otherwise, a
 * translated version of the text base and *FILENAME will be compared.
 *
 * If FILENAME does not exist, consider it unmodified.  If it exists
 * but is not under revision control (not even scheduled for
 * addition), return the error SVN_ERR_ENTRY_NOT_FOUND.
 */
svn_error_t *
svn_wc__text_modified_internal_p(svn_boolean_t *modified_p,
                                 const char *filename,
                                 svn_boolean_t force_comparison,
                                 svn_wc_adm_access_t *adm_access,
                                 svn_boolean_t compare_textbases,
                                 apr_pool_t *pool);



/* Merge the difference between LEFT and RIGHT into MERGE_TARGET,
   accumulating instructions to update the working copy into LOG_ACCUM.

   The merge result is stored in *MERGE_OUTCOME and merge conflicts
   are marked in MERGE_RESULT using LEFT_LABEL, RIGHT_LABEL and
   TARGET_LABEL.

   When DRY_RUN is true, no actual changes are made to the working copy.

   If DIFF3_CMD is specified, the given external diff3 tool will
   be used instead of our built in diff3 routines.

   When MERGE_OPTIONS are specified, they are used by the internal
   diff3 routines, or passed to the external diff3 tool.

   For a complete description, see svn_wc_merge2() for which this is
   the (loggy) implementation.

*/
svn_error_t *
svn_wc__merge_internal(svn_stringbuf_t **log_accum,
                       enum svn_wc_merge_outcome_t *merge_outcome,
                       const char *left,
                       const char *right,
                       const char *merge_target,
                       svn_wc_adm_access_t *adm_access,
                       const char *left_label,
                       const char *right_label,
                       const char *target_label,
                       svn_boolean_t dry_run,
                       const char *diff3_cmd,
                       const apr_array_header_t *merge_options,
                       apr_pool_t *pool);

#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif /* SVN_LIBSVN_WC_H */